CVE-2020-3176: Cisco Remote PHY Device Software Command Injection Vulnerability

Severity: medium (CVSS 6.7 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-03-04 · updated 2026-06-17
Weakness: CWE-77

Description

A vulnerability in Cisco Remote PHY Device Software could allow an authenticated, local attacker to execute commands on the underlying Linux shell of an affected device with root privileges. The vulnerability exists because the affected software does not properly sanitize user-supplied input. An attacker who has valid administrator access to an affected device could exploit this vulnerability by supplying certain CLI commands with crafted arguments. A successful exploit could allow the attacker to run arbitrary commands as the root user, which could result in a complete system compromise.

Affected products

Cisco Remote Phy 120 Firmware: before 7.7 — fixed in 7.7
Cisco Remote Phy 220 Firmware: all versions
Cisco Remote Phy Shelf 7200 Firmware: all versions

How to fix

Upgrade to a fixed version: Cisco Remote Phy 120 Firmware 7.7. Check the vendor advisory for mitigations.

References

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